SPRING-GAS 1760362 - Caterpillar

Do not disconnect or remove any oil lines until all oil pressure in main system has been released.
1. drain hydraulic oil level down to allow disconnection of lines and hoses without a lot of oil loss. 2. Disconnect four lines (1). 3. Attach hoist as shown. Remove four bolts (2) and plate with two valves (3). 4. Identify and remove all pilot oil lines (4). 5. Remove four bolts (5) to disconnect tube (6) from control valve (7). 6. Identify and remove all large lines (8).7. Fasten a hoist and remove three bolts (9) and control valve (7). Weight of control valve is 272 kg (600 lb) Install in the reverse order.End By:a. Fill the hydraulic tank with oil to the correct levelb. remove the air from the pilot system (See Procedure To Remove Air From The Oil In The Pilot System In Testing And Adjusting)Disassemble & Assemble Four Stem Control Valve
Start By:a. remove four stem control valve 1. Remove two housings (6). Remove springs (3) and (4), and retainers (5) from housings (6). Remove the O-ring seal from each housing (6).2. Remove retainers (2) and spool (1) from the main valve body. 3. Remove two housings (10). Remove springs (8) and retainers (9) from housings (10). Remove the O-ring seal from each housing (10).4. Remove retainers (7) and spool (11) from the main valve body. 5. Remove two housings (16). Remove springs (13) and (14), and retainers (15) from housings (16). Remove the O-ring seal from each housing (16). On the stick out portion of the control valve, remove additional spacer (18).6. Remove retainers (17) and spool (12) from the main valve body. 7. Remove two housings (24). Remove springs (20) and (21), retainers (22), and spacers (23) from housings (24). Remove the O-ring seal from each housing (24).8. Remove retainers (25) and spool (19) from the main valve body.
There is spring tension on housings (29).
9. Replace two bolts located diagonally on each housing (29) with two 1/21/2 "-13 x 89 mm (3 in) bolts. Remove the remaining two bolts. Slowly remove the two 1/21/2 "-13 x 89 mm (3 in) bolts to relieve the spring tension on each housing (29). Remove two housings (29). Remove the O-ring seal from each housing (29).10. Remove springs (27) and spacers (28) from housings (29). Remove spools (26) from the main valve body. The following steps are for assembly of the four stem control valve.11. Clean and inspect all parts. Carefully remove burrs by light stoning or lapping. Make sure there are no burrs or paint on mating surfaces of the valve body. Coat all parts with clean hydraulic oil. Use 1U6395 O-ring Assembly Compound to hold seals in place during assembly.12. Install spools (26) in the main valve body. Install a new O-ring seal in each housing (29). Install springs (27) and spacers (28) in housings (29). Install housings (29).13. Install spool (19) and retainers (25) in the main valve body.14. Install a new O-ring seal in each housing